How to set Node Attributes on a Chef Client?

Question

I'm using the chef-client cookbook to configure a machine as a chef client . How do I configure node attributes when this client is created ?

I do not want to do knife node edit . My aim is to set some node attributes when creating this node, probably by adding something to a JSON file.

UPDATE:

I am creating hundreds of nodes which will use this script (see the gist) to bootstrap chef-clients. Node_name which is in the script will be different for each node. Similarly I want to set a custom attribute to the node that will group them together.

Say for example I want to group all the nodes belonging to a particular project together. I was thinking I will add an attribute "project_id" to the Node. So that I can search later for all nodes belonging to a project. This is especially useful for deployments - while trying to find out all db_master roles / webserver roles / memcached roles belonging to a particular project .

So what I want to do is this : there should be some placeholder in the script (which you saw in the gist) where I can add custom attributes like project_id or whatever to the Node. Is that possible ?

PatrickWalker PatrickWalker · Accepted Answer · 2012-11-14T21:52:48

Both the above work or you can create them in recipes using something like

Node[attribute_name]

To keep with your json functionality you could leverage attributes or tags

to add attributes use something like this in your json file that you're generating. The attribute name and value can be generated in your script by parameters or csv/xml input

{

    "test_attribute" : "testvalue"
}

In the example you've linked to they are setting attributes under a chef-client hash

"chef_client": {
 "server_url": "http://ec2-23-20-173-176.compute-1.amazonaws.com:4000",
 "interval": "20"
}

Those attributes are created as normal node attributes and would be accessed by node["chef_client"]["interval"] for example.

Does that make sense?

How to set Node Attributes on a Chef Client?

3 Answers